dimpfel



' in-'the' oppositedirection'or-'during,its back that 'are then-made to closeithe lateral 'open-v in front ofthe piston Iat the same time that v g E To reverse the'vesselsmotion,fire valves the 'chamber toward the bow and through the waterfpassage D in the same direction during its back-stroke. In order thus .to reverse the action-fof the propeller, the vvalverod lo is Wardotliat-upon shiftingthevalves bymeans -.1'od; as .toputv the reversing -valve rod' l .finto gear withzjthe connecting-rod aof -the valve-arms, the 'action of thepropeller will lbereversed, although the engine ywill continue to -run` in the' samedirection.

` dents in cases of :"emergency, besides facilitatscribed are '-made'gto ac tsuddenlyupon the "i'ving at the' end oteither of 'its strokes oris -1 -heing'reversed the proper channelsvfor the ,ingressi and egressbf the 1 water wilibe v' I aetionoreffect on' the travel of; the piston B stroke b v-theehangedposition of the valves ings vcornmunieat'ng with the water-passages and to open Ithe ends of the piston-chamber, so' that water will be drawn into thechainber thewater behind the piston is.` expelled di'. rectly out of vthe chambewtogvard the vessels stern.

F and G. are turned partly round, so as tereverse the order in which they c'losetheorices in relation to the'course or travel of thel piston, so that dur'ingits forward stroke it will expellt'he water through the open end of lifted outbf gear with -the valve-lever by means'of aliandlem'and-the 'jointed links and leversjconnectedtherewith, while the other valve-frodi isat the-same time 4forced inof ",a handle/1i,- connecte'd with the coupling- The cross-frames which operate the respectivel valve-rodsilc and'l travel in' opposite direc'- tions to one another. Thus the action of the propeller caribe reversed. by connecting the valve to thesonje 'or theother' withoutthe l usual delayotstopping the engine, which will .fhavethe' effect to prevent numerous acciing. generallyl .the management of the'. vessel.A The toes whichcause-the valves to open and close the several inlets and outlets as devalves "at the proper intervals for this pur.- poseso that when the propelling-'piston is arpromptly opened, and thusa steadycontinuf' ous .propelling effect by'one pistonbeob'-v `as the piston throughout its double stroke propellingr effect. In addition to the advanf tage which is obtained .by reversing -tlle action of4 the propeller without' changing' or stopping the motion of the engine, the prnpelling 'eiect may be iucreased'or diminished at pleasure without' altering the velocity of any desired extent the water-valves of 4the propeller.

modified in its construction and in the .arrangenent of its parts without overstepping the limitsof my invention. Thus, for example, two or `more of such propellers Inlay be arranged at opposite sides ot the vessel, or valves of different construction Iinlay be eniployed in 'place of 'the turning-valves I have described. The pistonmd its chambermay' to secure by Letters Patent, s-

The -arrangement of the waterpassages,

a reciprocatingpiston and its chamber, substantially in the manner and for the purposes.

herein'set forth. j

' FR. P.V DIMPFEL.

`In presence of-'y WILLIAM WHELAN,

WM. SERRELL. y

; tained and the poweremployed economically,

continues to exert the same full'anddirect l the piston by partially opening or closing to The apparatus-I have describedfmay be apertures, and valves, in combination with `alsobe constructed 'in anyapprovedtmannerww 'f' and the guiding-wheels maybe arranged'fto 'What I claim. as my invention, and desire'.

-dr NJW." I 

